You are preparing to exit from an expressway. You should begin slowing to the posted safe speed for the ramp

A: As soon as you are off the expressway and on the exit ramp.

B: At least 100 feet after leaving the expressway

C: As late as you safely can, on the exit ramp.

Air inially occupying a volume of 1 m2 at 100 kpa, 27 c undergoes three internally reversible processes in series. process 1-2 compression to 500 kpa during which pv constant process 2-3 adiabatic expanslon to 100 kpa process 3-1: constant-pressure expansion to 100 kpa (a) calculate the change of entropy for each of the three processes. (b) calculate the heat and work involved in each process. (c) is this cycle a power cycle or refrigeration cycle?